:root {
    --bg: #f7f4fc; --ink: #191433; --muted: #5d5779; --line: rgba(25, 20, 51, 0.14);
    --panel: #ffffff; --accent: #d9246f; --on-accent: #ffffff; --glow: rgba(217, 36, 111, 0.22);
    --warn: #a3231b; --focus: #5b3ee8;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0d0f1f; --ink: #eff1fb; --muted: #a3a8c6; --line: rgba(255, 255, 255, 0.14);
      --panel: #171a30; --accent: #ff5c9a; --on-accent: #1a0714; --glow: rgba(255, 92, 154, 0.26);
      --warn: #ff8f85; --focus: #9db4ff;
    }
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0; color: var(--ink); font: 17px/1.6 "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
    background: radial-gradient(900px 520px at 85% 8%, var(--glow), transparent 70%), var(--bg);
    -webkit-text-size-adjust: 100%;
  }
  a { color: inherit; }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 8px; }
  .wrap { width: min(1080px, 100%); margin: 0 auto; padding: 0 24px; }
  .skip { position: absolute; left: -9999px; top: 0; background: var(--panel); padding: 10px 16px; z-index: 10; }
  .skip:focus { left: 0; }
  h1, h2, h3, p, ul { margin: 0; }

  .top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
  .brand { font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; text-decoration: none; }
  .channels { display: inline-flex; padding: 3px; border-radius: 999px; border: 1px solid var(--line); }
  .channel { border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 0.85rem; font-weight: 600; padding: 5px 14px; border-radius: 999px; cursor: pointer; }
  .channel[aria-pressed="true"] { background: var(--ink); color: var(--bg); }

  .hero { display: grid; gap: 56px; align-items: center; padding: 48px 0 72px; }
  @media (min-width: 900px) { .hero { grid-template-columns: 1.05fr 0.95fr; padding: 80px 0 96px; } }
  h1 { font-size: clamp(2.7rem, 7.2vw, 5.2rem); font-weight: 800; line-height: 1; letter-spacing: -0.04em; text-wrap: balance; }
  .lead { margin-top: 24px; max-width: 34em; font-size: 1.15rem; color: var(--muted); }
  .cta { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; }
  .btn {
    display: inline-flex; align-items: center; gap: 12px; padding: 16px 28px; border-radius: 14px;
    background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 1.05rem; text-decoration: none;
    box-shadow: 0 18px 40px -16px var(--glow), 0 2px 0 rgba(255, 255, 255, 0.25) inset; transition: transform 0.15s;
  }
  .btn:hover { transform: translateY(-2px); }
  .btn[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }
  .btn svg { width: 20px; height: 20px; fill: currentColor; }
  .meta { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--muted); font-size: 0.95rem; }
  .meta strong { color: var(--ink); }
  .hint { margin-top: 20px; max-width: 34em; font-size: 0.9rem; color: var(--muted); }
  .status { margin-top: 14px; color: var(--warn); font-size: 0.95rem; }

  .pal { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 22px; box-shadow: 0 40px 80px -40px var(--glow), 0 12px 30px -18px rgba(0, 0, 0, 0.35); }
  .pal-in { font-size: 1.3rem; font-weight: 600; min-height: 2.2rem; padding-bottom: 18px; border-bottom: 1px solid var(--line); letter-spacing: -0.01em; }
  .caret { display: inline-block; width: 2px; height: 1.2em; margin-left: 2px; vertical-align: -0.2em; background: var(--accent); animation: blink 1s steps(2) infinite; }
  .pal-out { display: grid; gap: 4px 12px; grid-template-columns: auto 1fr; align-items: center; padding: 18px 4px 6px; opacity: 0; transform: translateY(6px); transition: opacity 0.3s, transform 0.3s; }
  .pal-out.on { opacity: 1; transform: none; }
  .kind { padding: 3px 12px; border-radius: 8px; background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 0.9rem; }
  .when { font-weight: 650; }
  .what { grid-column: 2; color: var(--muted); }
  .keys { margin-top: 18px; display: flex; gap: 6px; color: var(--muted); font-size: 0.85rem; align-items: center; }
  kbd { font: inherit; font-size: 0.82rem; padding: 2px 8px; border-radius: 6px; border: 1px solid var(--line); border-bottom-width: 2px; background: var(--bg); color: var(--ink); }
  @keyframes blink { to { visibility: hidden; } }

  .feats { list-style: none; padding: 0; display: grid; gap: 0 56px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); border-bottom: 1px solid var(--line); }
  .feats li { padding: 28px 0; border-top: 1px solid var(--line); }
  h3 { font-size: 1.25rem; letter-spacing: -0.02em; margin-bottom: 6px; }
  .feats p { color: var(--muted); max-width: 30em; }

  section { padding: 72px 0 0; }
  h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); letter-spacing: -0.03em; line-height: 1.1; margin-bottom: 20px; }
  .chips { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
  .chips li { padding: 7px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--panel); font-size: 0.95rem; }
  .empty { color: var(--muted); }

  details { border-top: 1px solid var(--line); padding: 18px 0; }
  details:last-of-type { border-bottom: 1px solid var(--line); }
  summary { cursor: pointer; font-weight: 650; font-size: 1.05rem; }
  details > * + * { margin-top: 12px; }
  details p, .history p { color: var(--muted); }
  .history { list-style: none; padding: 0; display: grid; gap: 14px; }
  .history strong { margin-right: 10px; }
  .history span { color: var(--muted); font-size: 0.88rem; }
  code { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 0.88em; padding: 3px 8px; border-radius: 6px; background: var(--panel); border: 1px solid var(--line); word-break: break-all; }

  footer { margin-top: 88px; padding: 28px 0 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.92rem; display: flex; flex-wrap: wrap; gap: 8px 32px; justify-content: space-between; }
  footer nav { display: flex; gap: 20px; }
  @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .caret { animation: none; } .btn { transition: none; } .pal-out { transition: none; } }